Search results for "Toe"
showing 10 items of 3824 documents
A method for anomaly detection in hyperspectral images, using deep convolutional autoencoders
2017
Menetelmä poikkeavuuksien havaitsemiseen hyperspektrikuvista käyttäen syviä konvolutiivisia autoenkoodereita. Poikkeavuuksien havaitseminen kuvista, erityisesti hyperspektraalisista kuvista, on hankalaa. Kun ongelmaan yhdistetään ennalta tuntematon data ja poikkeavuudet, muodostuu ongelma vielä laajemmaksi. Spektraalisten poikkeavuuksien havaitsemiseen on kehitetty useita eri menetelmiä, mutta spatiaalisten poikkeavuuksien havaitseminen on huomattavasti hankalempaa. Tässä työssä esitellään uudenkaltainen menetelmä sekä spatiaalisten että spektraalisten poikkeavuuksien samanaikaiseen havaitsemiseen. Menetelmä on suunniteltu erityisesti spektraaliselle datalle, mutta soveltuu myös perinteisil…
Anomalous electrical parameters improvement in Ruthenium DSSC
2018
. In this work, we present a series of measurements carried out on Ruthenium-based Dye Sensitized Solar Cells (DSSCs) after the application of different external electrical field values. Such measurements have been performed both in the dark and by illuminating the sample with sunlight emitted by a solar simulator (AM1.5G spectrum with a power irradiance of 1000 W/m2). Our results demonstrate that the initial electrical bias field modifies in both cases the behavior of the cell in terms of an anomalous improvement of the main electrical parameters.
Anomalous performance enhancement effects in Ruthenium-based Dye Sensitized Solar Cells
2017
Dye Sensitized Solar Cells (DSSCs) are nowadays more and more employed since they present lower production costs than traditional silicon photovoltaic devices. An interesting phenomenon affecting such devices consists in the fact that current density-voltage (J-V) characteristic can depend on the history of the cell prior to the measurement, which often can be assimilated to an anomalous hysteresis effect. In this work, we study such phenomenon on Ruthenium-based DSSCs through a series of measurements performed after applying different values of external electrical field to the cell. The measurements have been carried out both under simulated sunlight (AM1.5G - 1000 W/m2) and in the dark. W…
Cardiovascular benefits and potential hazards of physical exercise in elderly people
2004
66–85-vuotiaiden liikunnallisesti aktiivisten naisten suorituskyky sydämen ja verenkiertoelimistön kuntoa mittaavassa kuormituskokeessa oli keskimäärin 40 % parempi kuin vastaavanikäisten harjoittelemattomien naisten. 75-vuotiailla miehillä ja naisilla parempi kestävyyskunto ennusti pidempää ikää. 76–78-vuotiaiden naisten suorituskyky parani keskimäärin 4-9 % neljän kuukauden kestävyys- ja voimaharjoittelulla. Harjoittelemattomassa vertailuryhmässä suorituskyky laski 6 % vastaavassa ajassa. Suorituskyvyn muutokset vaihtelivat kuitenkin huomattavasti yksilöstä toiseen. Verenkiertoelimistöön liittyviä terveysongelmia esiintyi harjoitteluohjelman aikana, mutta ne eivät liittyneet suoraan fyysi…
Icona vs quadro. Il dualismo visuale dell'ekphrasis dostoevskiana
2015
In questo articolo vengono esaminati alcuni aspetti degli interessi figurativi di Fëdor Michajlovič Dostoevskij, che com’è noto fu attento osservatore di opere d’arte, con lo scopo di individuare le modalità di appropriazione delle immagini da parte dell’autore This article examines some aspects of the figurative interests of Fyodor Mikhailovich Dostoevsky, who is known as an attentive observer of works of art, with the aim of identifying the ways in which the images were appropriated by the author
Enhanced Thin-Film Transistor Performance by Combining 13,6-N-Sulfinylacetamidopentacene with Printed PEDOT:PSS Electrodes
2011
Bottom-contact/bottom-gate organic thin-film transistors (OTFTs) are fabricated using a soluble pentacene precursor (13,6-N-sulfinylacetamidopentacene; SAP) and inkjet printed PEDOT:PSS electrodes on bare SiO2 dielectrics. Saturation mobility, Ion/Ioff ratio, and threshold voltage parameters, respectively, of 0.27 cm2 V−1 s−1, 105, and −4.25 V were measured under ambient conditions after the thermal conversion of SAP to pentacene in 100 μm long channel OTFT devices. The results obtained by the above solution approach are comparable to that of vapor-phase grown pentacene-based OTFTs with photolithographic gold contacts and organic buffer layers and/or inorganic injection layers. The present …
Actitud al cambio socioeducativo y Práctica educativa. Un análisis multifactorial en población docente
2015
La profundización en el campo de las actitudes y de la práctica de los docentes, ha supuesto un proceso complejo por varias razones. La complejidad de estas razones responde a factores diversos. Uno de estos factores tiene vinculación con la dimensión afectiva de las personas, por la admiración y el respeto que nos merecen seres humanos que aun trabajando en condiciones precarias y excluyentes, tratan de aportar lo mejor de sí, para superarse como personas y como actores educativos. Otras razones, responden a los retos y desafíos que la complejidad social, mundial y de la educación misma nos plantean en el momento actual. Por esto, consideramos que redescubrir las actitudes y la práctica de…
Improvement of catalytic activity over Cu--Fe modified Al-rich Beta catalyst for the selective catalytic reduction of NOx with NH3
2016
Copper and iron bimetal modified Al-rich Beta zeolites from template-free synthesis were prepared for selective catalytic reduction (SCR) of NOx with NH3 in exhaust gas streams. Comparing to the Cu-based and Fe-based mono-component Beta catalysts, Cu(3.0)-Fe(1.3)-Beta bi-component catalyst shows better low-temperature activity and wider reaction-temperature window. Over 80% of NO conversion can be achieved at the temperature region of 125–500 °C. Due to the synergistic effect of copper and iron evidenced by XRD, UV–Vis–NIR, EPR and XPS measurements, the dispersion state of active components as well as the ratio of Cu2+/Cu+ and Fe3+/Fe2+ were improved over Cu(3.0)-Fe(1.3)-Beta. Isolated Cu2+…
Surface Study of Pumice Supported Nickel Catalysts Used in the Hydrogenation of CO
1998
A series of pumice supported nickel catalysts used in the CO hydrogenation reaction were characterised by X-ray photoelectron spectroscopy. Qualitative and quantitative analysis of the XPS peaks have shown the effect of the calcination conditions on the chemical state of the nickel before hydrogenation and the particle size of the metal after reduction. Calcination at high temperature determined enrichment of sodium ions on the surface of the support and also on the metal particles. After exposure to the gas mixture CO/H2, formation of nickel carbides and other carbon species was checked. The correlation found between the surface atomic ratio Na/Si and the activity and selectivity of the ca…
Accelerated Light-Induced Defect Transformation Study of Elkem Solar Grade Silicon
2012
AbstractSolar cells made of silicon feedstock from a metallurgical route must qualify not only the initial efficiency, but must also be comparable to the solar cells made from reference polysilicon on the spectral response after light induced degradation. A detailed comparative study of light induced defects and its impact on cell performance is necessary for both materials. We have studied accelerated light induced degradation (ALID) defect transformation for Elkem Solar Silicon and polysilicon solar cells by selecting wafers from different positions from respective silicon bricks. Active boron-oxygen complexes and iron ions in multicrystalline silicon solar cells have been analyzed, and t…